# Determine the quantity (g) of pure MgSO{eq}_4 {/eq} in 2.4 g of MgSO{eq}_4 {/eq} • 7H{eq}_2 {/eq}O.

## Question:

Determine the quantity (g) of pure MgSO{eq}_4 {/eq} in 2.4 g of MgSO{eq}_4 {/eq} • 7H{eq}_2 {/eq}O.

## Hydrates of Salts:

Salts, often in commercial forms, have molecules of water adsorbed on their surfaces. These are called salt hydrates. The presence of water in the structure of the salt allows the crystal lattice of the salt to have a chemical formula of AB • n H{eq}_2 {/eq}O, where A is the cation, B is the anion, and n is the number of water molecules.

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If we look at the chemical formula of the compound, we have exactly one (1) mole of magnesium sulfate or MgSO{eq}_4 {/eq} in one mole of MgSO{eq}_4... Mass-to-Mass Stoichiometric Calculations

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Chapter 9 / Lesson 3
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